Step-by-step explanation:
To find the force of static friction, let's use the formula for static friction:
Force of static friction
≤
Coefficient of static friction
×
Normal force
Force of static friction≤Coefficient of static friction×Normal force
However, if the applied force is less than the maximum static friction force, the static friction will be equal to the applied force.
Given:
Applied force (
�
applied
F
applied
): 100 N
Normal force (
�
normal
F
normal
): 400 N (assuming no other vertical forces are acting)
a) The object will experience static friction equal to the applied force because it's less than the maximum static friction. Therefore, the force of static friction will be
100
N
100N.
b) To determine the smallest force that would cause the object to move, it would be the force equal to the maximum static friction. The maximum static friction is
400
N
400N (the normal force), as this is the force needed to overcome static friction and initiate motion. Therefore, the smallest force that would cause the object to move is
equal to or greater than
400
N
equal to or greater than 400N. Among the options provided, the smallest force that would cause motion is 401N (Option 4).